Hello list, Does anyone know of a nice way to convert WKT strings to sp Spatial objects? The list archives don't turn up anything conclusive beyond the possibility of doing it using rgeos, but I was wondering if anyone knew of a more 'stable', all R way of doing it? Thanks for any hints or thoughts you might have. Carson -- Carson J. Q. Farmer ISSP Doctoral Fellow National Centre for Geocomputation National University of Ireland, Maynooth, http://www.carsonfarmer.com/
WKT to sp objects
4 messages · Carson Farmer, Barry Rowlingson, Roger Bivand
On Sat, Jul 10, 2010 at 6:43 PM, Carson Farmer <carson.farmer at gmail.com> wrote:
Hello list, Does anyone know of a nice way to convert WKT strings to sp Spatial objects? The list archives don't turn up anything conclusive beyond the possibility of doing it using rgeos, but I was wondering if anyone knew of a more 'stable', all R way of doing it?
I found a blog post for some desktop GIS that did it by having the WKT in a CSV file, and then an OGR virtual vector file which specified having its data in the CSV in WKT format. http://www.mail-archive.com/jump-users at lists.jump-project.org/msg00124.html For all-R solution, you'd have to build the two files and then read them with readOGR. Or is there anything in the gdal C code exposed that does it? Barry
On Sat, 10 Jul 2010, Carson Farmer wrote:
Hello list, Does anyone know of a nice way to convert WKT strings to sp Spatial objects? The list archives don't turn up anything conclusive beyond the possibility of doing it using rgeos, but I was wondering if anyone knew of a more 'stable', all R way of doing it?
Please do try to support the rgeos effort, the code for reading and writing is there already, and is used in the testing suited ported there. The GSoC project is almost at mid-term, so the more developers trying functionalities the better. Best wishes, Roger
Thanks for any hints or thoughts you might have. Carson -- Carson J. Q. Farmer ISSP Doctoral Fellow National Centre for Geocomputation National University of Ireland, Maynooth, http://www.carsonfarmer.com/
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Roger Bivand Economic Geography Section, Department of Economics, Norwegian School of Economics and Business Administration, Helleveien 30, N-5045 Bergen, Norway. voice: +47 55 95 93 55; fax +47 55 95 95 43 e-mail: Roger.Bivand at nhh.no
I've actually just started playing around with rgeos, and it looks like it will do what I need. I'll try to push it a bit more this week. The reason I was looking for an all R solution was that the code would be running on a server somewhere that I won't have access to, and at this stage the server doesn't have rgeos installed (and the admins probably won't want to install it for little ol' me either). In the mean time, I'll fiddle about and see what I can come up with until I can convince them to install rgeos. Carson
On 10 July 2010 19:00, Roger Bivand <Roger.Bivand at nhh.no> wrote:
On Sat, 10 Jul 2010, Carson Farmer wrote:
Hello list, Does anyone know of a nice way to convert WKT strings to sp Spatial objects? The list archives don't turn up anything conclusive beyond the possibility of doing it using rgeos, but I was wondering if anyone knew of a more 'stable', all R way of doing it?
Please do try to support the rgeos effort, the code for reading and writing is there already, and is used in the testing suited ported there. The GSoC project is almost at mid-term, so the more developers trying functionalities the better. Best wishes, Roger
Thanks for any hints or thoughts you might have. Carson -- Carson J. Q. Farmer ISSP Doctoral Fellow National Centre for Geocomputation National University of Ireland, Maynooth, http://www.carsonfarmer.com/
_______________________________________________ R-sig-Geo mailing list R-sig-Geo at stat.math.ethz.ch https://stat.ethz.ch/mailman/listinfo/r-sig-geo
-- Roger Bivand Economic Geography Section, Department of Economics, Norwegian School of Economics and Business Administration, Helleveien 30, N-5045 Bergen, Norway. voice: +47 55 95 93 55; fax +47 55 95 95 43 e-mail: Roger.Bivand at nhh.no
Carson J. Q. Farmer ISSP Doctoral Fellow National Centre for Geocomputation National University of Ireland, Maynooth, http://www.carsonfarmer.com/